Driving arrangement for spindles of spinning and doubling frames



June 7, 1949. w NAEGELl DRIVING ARRANGEMENT FOR SPINDL'ES OF SPINNINGAND DOUBLING FRAMES Filed July 30, 1947 Patented June 7, 1949 DRIVINGARRANGEMENT FOR SPINDLES OF SPINNING AND DOUBLING FRAMES Werner Naegeli,Winterthur, Switzerland, as-

signor to Actiengesellschaft Joh. Jacob Rieter & (lie, Winterthur,Switzerland Application July 30, 1947, Serial No. 764,652 In GermanyFebruary 7, 1939 2 Claims.

The invention relates to a driving arrangement for spindles particularlyadapted for ring spinning and ring doubling frames.

Known driving arrangements of this type are generally provided with asheet metal driving roller or drum extending through the whole frame.The driving means (e. g. gut bands, or the like) are slung around theroller and pass tension devices, whereupon they are led to the spindlesor groups of spindles to be driven. These spindles are arranged on oneside or on both sides of the frame. In order to obtain a good running ofthe spindles it is necessary that the driving means leaving the rollerand running on to the spindles be tensioned in a horizontal planepassing through the middle of the wharves of the spindles.

The known driving arrangements do not completely meet this requirement.In these arrangements the sheet metal roller is always mounted somewhatbelow the aforementioned plane to prevent the driving means passing fromthe wharves on one side of the machine to those on the other side fromrubbing against the roller. This difference in mounting must be largerif broad band shaped driving means are used along their path from oneside of the frame to the other are running edge on corresponding to thevertically arranged driving surfaces of the wharves. The lower mountingof the driving roller causes the driving means to run obliquely onto thewharves. This is disadvantageous as the band brushes against the rims ofthe wharves, thus causing increased wear. Further the fact that thebands run on to different diameters of the wharve causes a brakingaction which disturbs the uniform running of the spindles.

It has already been proposed to obtain a horizontal running of thedriving means on to the wharves by interposing guide rollers, butbecause these are additional structures which consume power, render theworking difficult and increase the costs of the frame. Further anarrangement has been propsed in which instead of the driving rollerdriving disks are used, between which passes the band running from oneside of the frame to the other. This arrangement is also disadvantageousas disks in contra-distinction to rollers have heavier moving masses,whereby the danger of causing vibrations is increased. Furthermore theprovision of disks causes a draught of air which not only results inlosses of power but impairs the spinning process and enhances theformation of fly. Disks are particularly unfavorable when the directionof the rotation of the spindles has to be reversed, as in this case thetension device has to be displaced. This again requires correspondinglybroad and heavy disks.

These disadvantages are overcome according to the present invention byproviding the sheet metal roller with circumferential grooves in whichthe driving means on passing in a tensioned state from the spindles onone side of the frame to the spindles on the other side is located. Thedriving roller may in this case be mounted at such a height that itsupper part is situated in the plane passing through the middle of thewharves. The driving means, for instance the band, running off theroller as well as running on to this roller passes in a perfectlyhorizontal plane to the wharves, hence it does not brush the brim of thewharve no is it displaced on the latter. The wear of the driving meansis thereby reduced and the drive of the spindles is quite uniform. Onthe other hand the driving means does not contact the driving rollerduring its passage from one side of the frame to the other and theroller can be made of thin sheet metal having small moving masses.Unfavorable draughts of air do not occur, have the use of additionalstructures such as guide rollers and the like are avoided. On reversingthe direction of rotation of the spindles the band can be shifted on theroller, as the band passing from one side of the frame to the other doesnot alter its position in this case.

The arrangement according to the invention is particularly favorablewhen the tension device is located below the driving roller as in thiscase the part of the driving means running on to the roller and thatrunning off the latter run always in a horizontal plane on to thespindles and a ready reversal of the direction of rotation of thespindles is obtained by a displacement of the tension device. The rolleraffords thereby always the necessary bearing surface for the drivingmeans.

The grooves present the further advantage that the roller made of sheetmetal is stiffened and much more resistant against vibrations.

A constructional example of the invention is illustrated on theaccompanying drawing, in which Fig. 1 shows diagrammatically and invertical section a driving device according to the invention, and

Fig. 2 is a plan view of Fig. 1.

The driving means I which is shown in the drawing to be a band, passesround the wharves 2 of the spindles and around the driving roller ordrum 3. The latter is provided at several places with grooves 4 in whichthe driving means i is located without getting into contact with theroller 3 when passing from the wharves Z on one side of the machine tothose on the other side. The roller 3 is so mounted that its uppermostportion is situated in a plane passing through the middle of the widthof the wharves of the spindles 5. The driving means I run, after havingbeen turned through an angle of 90, in a perfectly straight manner on tothe wharves. As the face of the latter is slightly convex the band runsexactly in the middle of that face and does not rub against the rim.6. Atension device consisting of a roller 1 is arranged below the roller 3and is mounted on a lever 8 loaded by the tension weight 9. In order toreverse the direction of rotation of the spindles the direction ofrotation of the roller 3 is reversed and moreover all the tensiondevices are moved from the position I (Fig. 2) into position II bydisplacing all the levers 8, but the bands do not need to be reversed.The portion of the band passing from the wharves on one side to those onthe other side remains always in the groove 4 of the sheet metal roller.

1. A driving device for spindles of spinning and doubling frames,comprising a thin sheet metal driving roller extending through the frameand provided with circumferential grooves, spindles on both sides of theframe, and driving means for said spindles, the parts of said meanspassing from the spindles on one side to those on the other side beingsituated in said grooves.

2. A driving device for spindles of spinning and doubling frames,comprising a thin sheet metal driving roller extending through the frameand provided with circumferential grooves spindles on both sides of theframe, bands for driving said spindles, the parts of said bands passingfrom the spindles on one side to those on the other side being situatedin said grooves, and tension means for said bands arranged below saiddriving roller.

WERNER NAEGELI.

REFERENCES CITED The following references are of record in the file ofthis patent:

FOREIGN PATENTS Number Country Date 174,992 Switzerland May 1, 1935217,738 Switzerland Feb. 16, 1942 505,004 Great Britain May 3, 1939

